... ,Lightweight 4.CE,SGS Calcium Silicate Board Indoor and Outdoor Wall1.Sound absorption2.Heat Insulation3.Fireproof,Lightweight4 ... IngredientsQuartz sand, lime, mica, low-alkali cement and plant fiberNon- asbestos100% non-asbestosDensity1.3 g/cm3 ... schools, theaters, waiting room, ship’s rooms, and hospitals, etc.External Wall: Mainly used in urban ... more. Calcium Silicate Board Indoor and Outdoor Wall